Black-start method in consideration of participation of HVDC transmission system
A power transmission system, high-voltage direct current technology, applied in the direction of AC network circuits, circuit devices, power transmission AC networks, etc., can solve the problem of the lack of qualitative and quantitative evaluation of the impact of the system recovery at the time of startup, so as to avoid system collapse and improve Self-healing and recovery ability, optimizing the effect of the black start scheme
Active Publication Date: 2018-04-13
POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD +1
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Problems solved by technology
At present, there are some studies on the unlocking mode, start-up conditions and control methods of starting the HVDC transmission system in the black start phase, but the impact of the start-up time, start-up conditions and position in the grid on the system recovery is still unclear. Lack of qualitative and quantitative assessment methods
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Embodiment 1
[0075]In this embodiment, the grid A is taken as an example to illustrate the feasibility of the present invention. What needs to be explained is that the black start process of the grid A is started in the form of partitions, and then networking is carried out after the partition grid is formed. Taking the GD joint division as an example, the C power plant is used as the black start unit to carry out the black start of the GD joint division, and the high-voltage direct current transmission system is added to the black start process. The implementation process is as follows:
[0076] Step 1: Read in the data parameters of the bus, lines, transformers, high reactance, generators, important loads and DC drop points in the power network to be started, and establish a network connection model. Among them, the data parameters of the DC drop point of the GD joint partition are shown in Table 1.
[0077] Table 1 Data parameters of DC landing point in GD joint partition
[0078] ...
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The invention discloses a black-start method in consideration of the participation of a HVDC transmission system which belongs to the technical field of power system operation and control. The methodcomprises calculating the weight of each branch and the shortest weighted path by establishing a network connection model, and simplifying a start process by determining whether or not a DC effectiveinertia constant and the short-circuit capacity at a commutation bus satisfy a DC system startup condition; establishing a startup priority index and a black-start recovery optimization model to calculate the optimal power flow value, determining a starting mode according to whether a calculation result converges, finally updating the data parameters of the power network, and repeating the above processes until all generators to be started in the power network are started successfully. The method fully considers the influencing factor of the starting of the HVDC transmission system on the current power network, quickly determines whether the HVDC transmission system can be started in a relatively simple manner, and accelerates the black-start process of the power network while ensuring thestability of the power system.
Description
technical field [0001] The invention belongs to the technical field of power system operation and control, and in particular relates to a black start method considering the participation of a high-voltage direct current transmission system. Background technique [0002] The power system is recognized as the most complex man-made system. As a network structure, the chain reaction induced by local faults will lead to large-scale power outages, and even lead to the collapse of the entire power grid, resulting in huge economic losses. When a large-scale accident occurs and the power grid is completely black, the rapid recovery after the fault is a major problem faced by the operation and planning of the modern power system. Realizing the self-recovery of the power grid is an inevitable choice to ensure both network complexity and security. At present, the self-healing ability of the power grid is recognized as the core feature of the future smart grid, and a large number of func...
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IPC IPC(8): H02J3/36
CPCH02J3/36H02J2203/20Y02E60/60
Inventor 罗钢刘崇茹李欣蔚娄源媛钱峰吴国炳杨国银李力
Owner POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD